52 documents found, page 1 of 6
Distribution of Chlamydia trachomatis ompA-genotypes over three decades in Port...
Lodhia, Zohra; Cordeiro, Dora; Correia, Cristina; João, Inês; Carreira, Teresa; Vieira, Luís; Nunes, Alexandra; Ferreira, Rita; Schäfer, SandraObjectives: Chlamydia trachomatis is classified into 15 major genotypes, A to L3, based on the diversity of ompA gene. Here, we evaluated and characterised the distribution and diversity of ompA-genotypes over 32 years (1990–2021) in Portugal. Methods: The collection of the Portuguese National Reference Laboratory for Sexually Transmitted Infections includes 5824 C. trachomatis-positive samples that were succes...
Surveying genetic markers of antibiotic resistance and genomic background in Ch...
Lodhia, Zohra; da Silva, Jorge Costa; Correia, Cristina; Cordeiro, Dora; João, Inês; Carreira, Teresa; Schäfer, Sandra; Aliyeva, Elzara; Portugal, ClaraObjectives: To survey genetic markers of potential antimicrobial resistance (AMR) to macrolides and fluoroquinolones among Chlamydia trachomatis–positive samples from the collection of the Portuguese National Reference Laboratory for Sexually Transmitted Infections (STIs), and explore a multiplex PCR approach coupled with NGS to provide complementary information regarding a strain’s genomic backbone. Methods: A...
Probe-based metagenomic pathogen detection: advancing laboratory capacity for c...
Ferreira, Rita; Coelho, Luís; Santos, João Dourado; Sobral, Daniel; Isidro, Joana; Mixão, Verónica; Pinto, Miguel; Nunes, Alexandra; Borrego, Maria JoséProbe-based pathogen enrichment, followed by NGS, is a promising tool for complex diagnosis, overcoming traditional challenges of shotgun metagenomics, namely small microbial/human genetic material ratio and demanding computational resources. Here, we assessed the combined detection performance of two Illumina probe-based panels, the Respiratory and the Urinary Pathogen ID panels (RPIP and UPIP), using 99 clini...
Infeções por Chlamydia trachomatis e Neisseria gonorrhoeae: resultados do diagn...
João, Inês; Cordeiro, Dora; Correia, Cristina; Carreira, Teresa; Borrego, Maria JoséChlamydia trachomatis e Neisseria gonorrhoeae são responsáveis pelas duas infeções sexualmente transmissíveis (IST) curáveis mais comuns em todo o mundo. Sendo frequentemente assintomáticas, o rastreio laboratorial destas IST é fundamental, para que possa ser efetuado o tratamento adequado que evite o desenvolvimento de sequelas clínicas graves e para quebrar cadeias de transmissão. O presente estudo teve por o...
An Overview of Monkeypox Virus Detection in Different Clinical Samples and Anal...
Cordeiro, Rita; Pelerito, Ana; de Carvalho, Isabel Lopes; Lopo, Sílvia; Neves, Raquel; Rocha, Raquel; Palminha, Paula; Verdasca, NunoMpox is a zoonotic disease caused by the Monkeypox virus (MPXV), and since May 2022, tens of thousands of cases have been reported in non-endemic countries. We aimed to evaluate the suitability of different sample types for mpox diagnostic and assess the temporal dynamics of viral load. We evaluated 1914 samples from 953 laboratory-confirmed cases. The positivity rate was higher for lesion (91.3%) and rectal sw...
Guidelines for the Diagnosis and Treatment of Uncomplicated (Non-Lymphogranulom...
Andrade, Pedro; Azevedo, Jacinta; Lisboa, Carmen; Fernandes, Cândida; Borrego, Maria José; Borges-Costa, João; Reis, Joel; Santiago, FelicidadeChlamydia trachomatis infection is the most prevalent sexually transmitted bacterial infection in the world. Being associated with a large number of asymptomatic carriers, the diagnosis is frequently challenging and requires appropriate laboratory testing. In Portugal, the incidence of the disease has been consistently increasing in recent years, meaning that special awareness is required for case identificatio...
Chlamydial and Gonococcal Genital Infections: A Narrative Review
Rodrigues, Rafaela; Vieira-Baptista, Pedro; Catalão, Carlos; Borrego, Maria José; Sousa, Carlos; Vale, NunoSexually transmitted infections (STIs) constitute one of the leading causes of disease burden worldwide, leading to considerable morbidity, mortality, health expenditures, and stigma. Of note are the most common bacterial STIs, chlamydial and gonococcal infections, whose etiological agents are Chlamydia trachomatis (CT) and Neisseria gonorrhoeae (NG), respectively. Despite being usually asymptomatic, in some ca...
Viral genetic clustering and transmission dynamics of the 2022 mpox outbreak in...
Borges, Vítor; Duque, Mariana Perez; Martins, João Vieira; Vasconcelos, Paula; Ferreira, Rita; Sobral, Daniel; Pelerito, Ana; de Carvalho, Isabel LopesPathogen genome sequencing during epidemics enhances our ability to identify and understand suspected clusters and investigate their relationships. Here, we combine genomic and epidemiological data of the 2022 mpox outbreak to better understand early viral spread, diversification and transmission dynamics. By sequencing 52% of the confirmed cases in Portugal, we identified the mpox virus sublineages with the hi...
Biofilm Formation by ST17 and ST19 Strains of Streptococcus agalactiae
Silvestre, Inês; Borrego, Maria José; Jordão, LuísaBacterial biofilms are an important virulence factor with a vital role in evasion from the host immune system, colonization and infection. The aim of the present study was to evaluate in vitro the effects of three environmental factors (H+ , glucose and human plasma) in biofilm formation, by carrier and invasive S. agalactiae strains of ST17 and ST19 sequence types, including DNase producers and nonproducers. B...
Viral genetic clustering and transmission dynamics of the 2022 mpox outbreak in...
Borges, Vítor; Duque, Mariana Perez; Martins, João Vieira; Vasconcelos, Paula; Ferreira, Rita; Sobral, Daniel; Pelerito, Ana; de Carvalho, Isabel LopesPathogen genome sequencing during epidemics enhances our ability to identify and understand suspected clusters and investigate their relationships. Here, we combine genomic and epidemiological data of the 2022 mpox outbreak to better understand early viral spread, diversification and transmission dynamics. By sequencing 52% of the confirmed cases in Portugal, we identified the mpox virus sublineages with the hi...